Recently tweaked a tlr 200 to 4rt angle - bike steered better but lost 20 mm on wheel base in the process which made front end lighter on climbs. Longer swing arm due to be fitted when time allows. 
Therefore check both ends. 
Fork yoke/triple clamp offset is also different on modern bikes which will probably effect ratio of angle, trail, Castor etc. 
Check your maths Frist.